Sheet Pan Fajita Veggies (Flavorful & EASY!)

Why you’ll love this recipe?

Fajita is a Tex-Mex, Texan-Mexican American dish that contains thin strips of a beef skirt or chicken, bell peppers, chilies, and onions. They are all seasoned with a so-called fajita spice mix. They are either roasted, grilled, or pan-fried in a skillet.

You may wonder whether our recipe is the copycat Chipotle fajita veggies. No, this recipe is much more flavorful in comparison. Why? Because we use a 5-ingredient homemade fajita seasoning. And the popular Tex-Mex restaurant uses only 5 ingredients altogether: green bell peppers, red onions, oregano, sunflower oil, salt, and black pepper.

You’ll love our fajita veggies recipe because it is packed with flavors, super easy, and mess-free to make. If you choose to roast the vegetables, then you can make a huge batch in one go.

Ingredients

We use vegetables of all colors in combination to have a rainbow at the end. Here is what you need to make roasted fajita vegetables in the oven. That’s all you need if you want to keep it classic, I mean. So, no cherry tomatoes and no mushrooms. Just strips of roasted peppers and onions.

• Onions
• Bell peppers – We used red, yellow, and green bell peppers to make our fajita colorful, but obviously, you can use one color only. 
• Chili peppers (optional) – jalapeno, poblano, habanero, or serrano (if you like it hot and spicy)
• Homemade fajita seasoning – hot chili powder or chili flakes, sweet smoked paprika, cumin, garlic powder, and oregano (or Mexican oregano if you can get your hands on it). You can use taco seasoning. It is close but has way more chili powder, so expect your fajita veggies to be quite spicy.

? You can find detailed measurements for all ingredients in the printable version of the recipe card at the bottom of this post.

Instructions

How to cut onions for fajitas?

1. Peel the onion.
2. Cut a little from both ends (both stem and root).
3. First, cut it in half.
4. Place the half onion on its flat side and make horizontal cuts of 1/4-inch (4-5 mm) wide. Take the slices apart.

How to cut bell peppers for fajitas? 

1. Wash the bell peppers.
2. Cut off the bottom, cut it in half, and take the seeds out.
3. Place the half pepper on its open flat side and make horizontal cuts of 1/4-inch (4-5 mm) wide. If you have large bell peppers, you might want to cut the strips in half to be as long as the onion strips. 

A quick tip: If you work with hot chili peppers, make sure to wash your hand, knife, and cutting board thoroughly after. And don’t touch your eyes! 🙂

How to roast fajita veggies?

1. Mix your spices (hot chili powder, sweet smoked paprika, ground cumin seeds, garlic powder, and dried oregano) in a small bowl.
2. Place parchment paper in a sheet pan and place the prepared veggie strips on it.
3. Sprinkle them with olive oil and season them with half of the spice mix plus salt and black pepper. Mix them with tongs to make sure you cover all sides thoroughly.

4. Roast them in a preheated oven of 430 Fahrenheit (ca. 221 °C).
5. After 10 minutes, take the sheet pan out, turn the veggies with tongs, and sprinkle them with the other half of the spice mix.
6. Roast them for 10 more minutes.

Cooking tips

• Use a sheet pan with parchment paper. – We recommend using a sheet pan because it has sides. If you use a large baking sheet, the juices from the veggies during roasting might flow off of it. 
• Cut veggies into equal strips. – This is to make sure the vegetables are ready at the same time.
• Place veggies in groups. – If they are grouped the ingredients separately, they will be easier to mix and match when you serve them. 
• Hot and sweet peppers together? – If you prepare them for kids or for people who don’t like spicy food, roast hot chili peppers separately. Otherwise, the juices of the hot peppers may make the sweet bell peppers also spicy.

Variations

After preparing and cutting your vegetables, you can use other ways to get them ready. You can grill them in aluminum foil drip pans on your gas grill or charcoal grill.

Or you can pan-fry them in a large cast-iron skillet, grill pan, or griddle on medium-high heat. We show you how to do it in our vegan burrito bowl recipe.

Serving ideas

Fajita is a Mexican or Tex-Mex dish, therefore vegetables seasoned with fajitas spice mix go great with many delicious recipes: 

• Fajitas (try our Portobello Fajitas)
• Burritos (try our Copycat Chipotle Veggie Burrito)
• Burrito Bowls (try our Copycat Chipotle Veggie Bowl – pictured below or Mexican Sweet Potato Rice Bowl)
• Tacos (try our Oyster Mushroom Tacos)
• Nachos / Tortilla Chips
• Quesadillas (try our Hummus Quesadillas)
• Burgers (try our Vegan Portobello Mushroom Burger)
• Frittata (add it to Chickpea Flour-based Vegan Frittata)
• Breakfast Scramble
• Avocado Sandwich or Toast

Other combinations

Whether you use flour tortillas to make a burrito or corn tortillas to make tacos, you can add many delicious sides to accompany your grilled vegetables. If we are talking about Mexican or Tex-Mex food, these sides are kind of staples to add: 

• Brown rice (or even quinoa) – we show you how to make easy cilantro lime rice in our vegan burrito bowl recipe
• Guacamole or avocado slices – we show you how to make guacamole in our vegan burrito bowl recipe
• Sour cream – we have a homemade vegan sour cream recipe
• Black beans
• Chipotle Sofritas
• Chipotle plant-based chorizo
• Salsa – we show you how to make tomato and corn salsa fresca in our vegan burrito bowl recipe
• Freshly chopped cilantro
• Lime juice
• Grain-free tortillas

Storing tips

How to store leftovers? We recommend using an airtight container and storing them in the refrigerator for up to 4-5 days.

Roasted vegetables, especially bell peppers, and onions, are perfect for meal prepping. Baking them in the oven will give you large batches that you can then eat through the week.

FAQs

Sheet Pan Fajita Veggies (Flavorful & EASY!)

Nandi Barta

What is the easiest way to make vegetables ready for fajitas? Bake them in the oven. It is a one-pot (I mean one sheet pan), no-mess, easy and quick method to make fajita veggies. More flavorful than the ones in Chipotle. BONUS – we included easy homemade fajita seasoning. So grab the recipe now!

4.8 from 17 votes

Print Recipe

Prep Time 10 minutes mins

Baking time 20 minutes mins

Total Time 30 minutes mins

Course Side Dish

Servings 6 servings

Calories 74kcal

Equipment

• Regular parchment paper

Ingredients

  

Fajita veggies

• 1 Red onion (medium)
• 3 Bell pepper (red, yellow, green)
• 2 Tbsp Olive oil
• Salt and Pepper to taste

Homemade fajitas seasoning

• ½ tsp Hot chili powder or flakes
• 1 Tbsp Sweet smoked paprika powder
• 1 + ½ tsp Ground cumin seeds
• 1 + ½ tsp Garlic powder
• 1 + ½ tsp Oregano

Instructions

 

Make homemade fajitas seasoning

• Mix all spices in a small bowl: hot chili powder, sweet smoked paprika, cumin, garlic powder, and oregano.

Make fajitas veggie

• Peel the onion. Cut a bit from both ends (stem and root). Then, cut it in half. Now, place the half onion on its flat side and make horizontal cuts. I usually cut it as thin as the width of an onion layer. 
• Wash the pepper. Lay it on its side and cut off the stem. Now, cut it in half and take the seeds out. Now, place the half pepper on its open flat side and make horizontal cuts of 1/4-inch (4-5 mm) wide.
• Place parchment paper in a sheet pan and place the prepared veggie strips on it.
• Sprinkle them with olive oil and season them with half of the spice mix, salt, and black pepper. Mix them with tongs.
• Roast them in a preheated oven of 430 Fahrenheit (ca. 221 °C).
• After 10 minutes, take the sheet pan out, turn the veggies with tongs, and sprinkle them with the other half of the spice mix. Roast them for 10 more minutes.

Notes

• Use a sheet pan with parchment paper. We recommend using a sheet pan because it has sides. If you use a baking sheet, the juices from the veggies during roasting might not flow off of it. 
• Cut veggies into equal strips. This is to make sure the vegetables are ready at the same time.
• Place veggies in batches on the sheet pan. If they are grouped together, they will be easier to mix and match and serve. 
• Hot and sweet together? – In case you prepare the veggies for kids or for people who don’t like spicy food, roast hot chili peppers separate from all other veggies. If you roast hot chili peppers and bell peppers together, the juices of the hot chili peppers may make the sweet bell peppers also spicy and hot.
• Other ways to make fajitas veggies. After preparing and cutting your veggies you can use other ways to get them ready like 1) Sautee them in a cast-iron skillet or grill pan* or griddle or 2) Grill them in aluminum foil drip pans* on your BBQ.

UPDATED: This recipe was originally posted in January 2020. More tips, serving ideas, and FAQs were added and republished in April 2023.